The businesswoman and reality star posted two personal photos to her Tumblr, showing herself with her new bundle of joy shortly after birth and her daughter Arabella snuggling with her new little brother, who happens to have quite a serious name.

"Please join in our joy as we welcome Joseph Frederick Kushner, named after each of our paternal grandfathers, both master builders of their generation and inspiring patriarchs of their families," Trump wrote.

"Jared's grandfather, Joseph, was a rock. His indomitable spirit, his sense of family, and his work ethic are the values we hope to hand down to our son. My grandfather, Frederick, was a builder not just of tens of thousands of homes throughout this city, but of a tight-knit family that honors to this day the traditions he established."

"Both men set the standards that have been passed down through the generations and which we hope to impart upon Joseph and Arabella. They created a legacy for our family that inspires our careers as well as our love and respect for one another. We are honored to name our son after these two distinguished men. We feel so blessed with the newest member of the family!"